NEC Code Questions Practice Test-20

Question 1: What is the maximum voltage drop that is recommended by NEC for branch conductor and feeder conductor?

• 3 %
• 5 %
• 8 %
• 4 %

Question 2: What is the minimum load that is required for exterior sign or outline lightening for a commercial occupancy as per NEC?

• 12000 VA
• 18000 VA
• 15000 VA
• 21000 VA

NEC Reference: NEC 220.14(F)

Question 3: A cord and plug device used as disconnecting means for a motor must be rated for ..................

• Horsepower
• voltage
• Resistance
• Current

NEC Reference: NEC 430.109(F)

Question 4: A 2400 volts motor disconnecting means must be capable of being locked in the .....................

• closed position
• Open position
• ON position
• Both open and close position

NEC Reference: NEC 430.227

Question 5: If the branch circuit rating more than ................., the lamp holders connected to it should be of the heavy duty type.

• 20 amperes
• 25 amperes
• 40 amperes
• 45 amperes

NEC Reference: NEC 210.21(A)

Question 6: All 15 or 20 amperes receptacle outlets installed in bathrooms of dwelling units must always require .............................

• Non ground recetacles
• water proof receptacles
• protective gaurds
• Ground fault circuit interceptor ( GFCI)

NEC Reference: NEC 210.8(A)(1)

Question 7: How much power consumed by 240 volts circuit that draws 30 amperes current?

• 7.2 KW
• 5.2 KW
• 8.5 KW
• 9.3 KW

Question 8: For conductors supplying portable signs in a dry location what is the maximum length in feet allowed?

• 16
• 12
• 15
• 8

NEC Reference: NEC 600.10(D)(2)

Question 9: For a commercial kitchen with two electrical equipment, what demand factor is allowed?

• 100 %
• 80 %
• 70 %
• 90 %

NEC Reference: NEC 220.56